Across
- 4. a group of related items that work together to do something
- 5. in a way that is important or large enough to make a difference
- 6. water found underground in soil or rock
- 8. a need or requirement
- 10. a series of actions taken to make or do something
- 11. the effect of one thing on another thing
- 12. something that is necessary
- 13. a way to supply water to land or crops
- 15. very harsh
Down
- 1. to use up so that there is little or nothing left
- 2. a rule or law that limits something
- 3. happening over a large area or to many people
- 7. things that exist in a region and can be used to provide for people
- 9. one thing that causes a certain outcome
- 10. referring to a specific item or thing
- 14. to cause something to change